KEYENCE ES-M2P User Manual
C2
C1
OFF
OFF
N.C.
N.O.
ES-M1
SENS
ALM
OUT
10ms
C2
C1
OFF
OFF
N.C.
N.O.
ES-M2
SENS
ALM
OUT
10ms
2
3
4
WARNING
96M1093
Separate-amplifier Proximity Sensor
ES-M1(P)/M2(P)
Instruction Manual
Read this manual before using the product in order to achieve
maximum performance.
Keep this manual in a safe place after reading it so that it can be used
at any time.
• The ES-M1/M2 are intended for target detection. Do not use
these products in a safety circuit for protecting the human
body.
• The ES-M1/M2 are not explosion-proof. Do not use these
products in an environment where inflammable gas, liquid or
powder is present.
PART NAMES AND FUNCTIONS
ES-M1 (Main unit) ES-M2 (Expansion unit)
Sensor cable insertion port
Terminal block tightening screws
Mutual interference suppression selector switch
Operating indicator (Red)
Disconnection alarm indicator (Yellow)
Sensitivity adjustment trimmer
Output timer selector switch
Output delay: 10 ms
Output timer OFF
Output mode selector switch
N.C. (NEAR-OFF)
N.O. (NEAR-ON)
1. In N.O. operation mode: OFF-delay timer 10 ms
In N.C. operation mode: ON-delay timer 10 ms
I/O CIRCUIT DIAGRAM
■ NPN
ES-M1
Main circuit
Overcurrent
protection circuit
Brown
Black
(Control
output)
Orange
Blue
100mA max
Load
100mA max
Load
(Disconnection
alarm output)
12 to 24 VDC
5 to 40 VDC
5 to 40 VDC
0V
1.
ES-M2
Main circuit
Expansion
connector
Overcurrent
protection circuit
100mA max
Black
(Control output)
5 to 40 VDC
Load
FEATURES
■ One-line connection system
See “MOUNTING SEVERAL AMPLIFIERS” on page 2.
A wire-saving sensor system can be established by combining other
one-line connection amplifiers such as the FS-V10 Series or LV
Series.
■ Easy connection with the European terminal
See “SENSOR HEAD CONNECTION” on page 1.
The sensor head is connected to the amplifier through the European
terminal, allowing easy and quick connection.
■ Disconnection alarm indicator & output
See “PART NAMES AND FUNCTIONS” on page 1.
The alarm indicator and output turn on when the sensor head is
disconnected, enabling quick discovery of abnormal condition. (The
ES-M2 features the indicator only.)
■ Mutual interference suppression function
See “MUTUAL INTERFERENCE SUPPRESSION” on page 2.
Mutual interference among several sensors that are used in close
proximity can be suppressed by a simple operation.
ACCESSORIES
Instruction Manual: 1 End unit: 2 (ES-M2 only)
Metal screwdriver: 1 Cautions sticker: 1 (ES-M2 only)
Mounting bracket: 1 (ES-M1 only)
SENSOR HEAD CONNECTION
1. Modify the end of the sensor
cable as illustrated on the right.
Outer sheath
Be sure to tightly twist the shield
wire and core wire separately.
Core wire
* When the outer sheath is stripped, the shield wire appears around the core
wire. Separate the core wire and shield wire before modifying the cable.
2. Turn the terminal block tightening
screws counterclockwise to loosen
them.
Terminal block
tightening screws
3. Insert the sensor cable straight into
the insertion port of the amplifier.
Make sure that the core wire and
Shield wire
shield wire are inserted into the correct
ports and that the cable does not twist.
4. Turn the terminal block tightening
screws clockwise to tighten them. Be
sure to limit the tightening torque to
0.15 N•m.
Terminal block
tightening screws
5. Turn ON the amplifier and check that
the disconnection alarm indicator
remains OFF. If the indicator is ON, go
back to step 1 and repeat the
procedure again.
Shield wire
5 ±1 mm
14 ±1 mm
Core wire
MOUNTING AMPLIFIER
■ Mounting/Detaching the amplifier to/from a DIN rail or
the mounting bracket
Hook the claw located at the amplifier cable side onto the DIN rail, and
then hook the front side claw to the rail while pressing the amplifier
forward. To detach the amplifier, unhook the front claw by lifting the
amplifier front side while pressing it forward.
Mounting Detaching
■ PNP
ES-M1P
Overcurrent
Main circuit
protection circuit
Brown
Black
(Control output)
100mA max
Orange
(Disconnection
alarm output)
Blue
100mA max
Load
Load
12 to 24 VDC
OV
ES-M2P
Overcurrent
Main circuit
protection circuit
12 to 24 VDC
100mA max
Black
(Control output)
■ Side mounting
Using the side holes of the supplied mounting bracket (ES-M1 only),
fix the amplifier with screws.
M3 screw
Load
OV
1
A
B
A
B
øA
B
HINTS ON CORRECT USE
• To extend the sensor head cable, be sure to use a high-frequency
coaxial cable and limit the length between the amplifier and sensor
head to 10 m or less (5 m when the EH-302/402 is used). Be sure to
use an BNC connector (see the table below).
Plug BNC-P-1.5 (or equivalent products)
Jack BNC-J-1.5 (or equivalent products)
• To extend the amplifier cable, use a cable with at least a 0.3 mm
2
nominal cross-section area. Limit the length of cable extension to no
more than 100 m. (To connect several amplifiers, contact KEYENCE
for further information.)
• If the amplifier cable is placed together with power lines or highvoltage lines in the same conduit, detection error may occur due to
noise interference, or the sensor may be damaged. Isolate the
amplifier cable from these lines.
• When using a commercially available switching regulator, ground
the F.G. terminal and ground terminal.
• During maximum sensitivity setting, the detecting distance may vary
due to the difference in characteristics of each unit.
• If the wiring is incorrect, the unit may heat up, or the sensitivity may
fluctuate. (See “I/O CIRCUIT DIAGRAM”.)
• The EH-422, 430, 440, and 290 sensor heads cannot be connected
to the ES-M1/M2. Contact KEYENCE for information on connectable
amplifiers.
MOUNTING THE SENSOR HEAD
• Cylindrical type
Secure the sensor head with a
screw at a position 5 mm or more
from the tip of the head. (Tightening
torque: 0.2 N•m max.)
• For the EH-402, secure the sensor
head to the metal part 15 mm or
more from the tip.
• Threaded type
When mounting the threaded-type sensor head, do not tighten
beyond the torque specified in the following table.
Model Tightening torque
EH-108 8 N•m max.
EH-110 10 N•m max.
EH-114
EH-416
M3 screw
(Flat point or cup point)
20 N•m max.
5 mm min.
SURROUNDING METAL
Shielded-type sensors can be flush-mounted in a metal base. Sensors
of the non-shielded type, however, should be mounted according to
the guidelines given below in order to minimize interference from the
surrounding metal.
Distance (mm)
Model
EH-402 20 15
EH-416 30 10
AB
NEAR-ON OPERATION
■ NEAR-ON operation
1. With the target in place, turn the trimmer
clockwise and find point A at which the
output indicator lights. (If the output
indicator is already lit, turn the trimmer
counterclockwise.)
2. With the target removed, again turn the
trimmer clockwise and find point B at
which the output indicator lights.
Lights when target
is in place
Indicator
turns off
Trimmer
Optimal position
Detecting range
Lights when there
is no target
2. With the target removed, again turn the trimmer clockwise and find
point B at which the output indicator lights.
3. Set the trimmer midway between points A and B. The output circuit
will now actuate when the output indicator lights.
The values in parentheses are the values when the mutual interference suppression function is used.
MUTUAL INTERFERENCE SUPPRESSION
• When installing two or more sensors of the same model face-to-face
or in parallel, separate by the distance specified in the following
table to prevent interference. The values in parentheses are for
when the mutual interference suppression function is used.
Distance Face-to-face Parallel
Model
EH-302 2 (1) No space required
EH-303A 2 (1) No space required
EH-305(S) 5 (3) No space required
EH-308(S) 10 (7) No space required
EH-110(S) 7 (4) 35 (no space required)
EH-114 11(6) 39 (no space required)
EH-605 5 (3) 14 (no space required)
EH-614A 11(6) 64 (no space required)
EH-108 7 (4) No space required
EH-910 26 (9) 22 (no space required)
EH-402 53 (12) 23 (11)
EH-416 11 (7) 115 (no space required)
(mm min.) (mm min.)
[Note]
The above figures apply when the trimmer is turned to its optimal
position for stable detection.
• When the mutual interference suppression function is used for three
or less sensor heads, set the mutual interference suppression
selector switch located on the amplifier to “OFF” for the first unit,
“C1” for the second unit, “C2” for the third unit. Contact KEYENCE
when four or more sensors are connected.
MOUNTING SEVERAL AMPLIFIERS
■ Mounting several units
1. Remove the protective cover.
2. Mount the amplifiers to the DIN rail one by one.
3. Slide one expansion unit toward another. Align the front claws of
the amplifiers and push the amplifiers together until they click.
4. Fix the amplifiers together by pushing the end units toward each end
(End units are included with the ES-M2).
■ Detaching amplifiers from DIN rail
1. Remove the end units.
2. Slide the expansion units apart and detach them individually.
(Do not detach multiple amplifiers connected together with end
units.)
[Notes]
• To connect several units, be sure to use a DIN rail and end units.
• To mount or detach several units, be sure to turn the power off.
• Do not remove the protective cover of the expansion connector on
the outermost unit.
Align the claw.
Expansion
unit
Main
unit
End unit (Included with expansion unit)
3. Set the trimmer midway between points A and B. The output circuit
will now actuate when the output indicator lights.
The values in parentheses are the values when the mutual interfer-
Up to 16 expansion units can
be connected.
ence suppression function is used.
Lights when target
■ NEAR-OFF operation
1. With the target in place, turn the trimmer
clockwise and find point A at which the
output indicator lights. (If the output
indicator is already lit, turn the trimmer
counterclockwise.)
is in place
Indicator
lights
Trimmer
Optimal position
Detecting range
Turns off when
there is no target
2
Remove the protective cover.
• The sticker shown on the right is included in the
expansion unit. Apply this sticker near the sensor.
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